WO2008019633A1 - Procédé de traitement des pulpes aqueuses de minéraux latéritiques selon la technologie acide sous pression - Google Patents

Procédé de traitement des pulpes aqueuses de minéraux latéritiques selon la technologie acide sous pression Download PDF

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Publication number
WO2008019633A1
WO2008019633A1 PCT/CU2007/000016 CU2007000016W WO2008019633A1 WO 2008019633 A1 WO2008019633 A1 WO 2008019633A1 CU 2007000016 W CU2007000016 W CU 2007000016W WO 2008019633 A1 WO2008019633 A1 WO 2008019633A1
Authority
WO
WIPO (PCT)
Prior art keywords
treatment
procedure
pulp
lateritic
minerals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CU2007/000016
Other languages
English (en)
Spanish (es)
Inventor
E Esteban Luis Alfonso Olmo
J José Castellanos Suáres
A Áida Álvarez Alonso
F María De Fatima Bugallo Davis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Centro de Investigaciones para la Industria Minero Metalurgica
Original Assignee
Centro de Investigaciones para la Industria Minero Metalurgica
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Centro de Investigaciones para la Industria Minero Metalurgica filed Critical Centro de Investigaciones para la Industria Minero Metalurgica
Priority to AU2007283855A priority Critical patent/AU2007283855B2/en
Priority to EP07785491A priority patent/EP2058410B1/fr
Publication of WO2008019633A1 publication Critical patent/WO2008019633A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B23/00—Obtaining nickel or cobalt
    • C22B23/04—Obtaining nickel or cobalt by wet processes
    • C22B23/0407—Leaching processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B23/00—Obtaining nickel or cobalt
    • C22B23/04—Obtaining nickel or cobalt by wet processes
    • C22B23/0407—Leaching processes
    • C22B23/0415—Leaching processes with acids or salt solutions except ammonium salts solutions
    • C22B23/043—Sulfurated acids or salts thereof
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/02—Apparatus therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • This invention relates to non-ferrous hydrometallurgy and, in particular, to the thickening of the aqueous pulps of lateritic minerals in the pressure acid technology.
  • the volume or productivity of mineral processing in pressure acid technology is limited by the capacity of the equipment used in the process and by the maximum% of solids that can be fed to autoclaves or leaching reactors.
  • processing a pulp with a high% solids and viscosity decreases the mass transfer coefficient within the autoclave, lowering the kinetics of leaching and the extraction of metals.
  • a high viscosity of the pulp lowers its pumpability and increases energy consumption.
  • a key factor constitutes the thickening of the aqueous pulps of crude ore, coming from the pulp preparation plant, which is It is made in the thickener plant, where they are thickened from diluted pulps with initial concentrations of 5-30%, depending on the type of mineral and the operation of the plant.
  • the thickened pulp reaches a% of solids between 45-48% of solids at the exit of the sedimentators, operating at the design productivity. It has been shown that an increase in productivity of thickeners (settlers) causes a drop in the% solids of thickened pulp (bottom flow)
  • a notable increase in the production of nickel and cobalt with the existing technique is conditioned to increases in the concentration of solids and the productivity of the thickeners, requiring that the pulps be pumpable. These pulp are preheated with steam and fed to the autoclaves.
  • An increase in the% of solids within the autoclaves represents an increase in the production of nickel and cobalt, a decrease in steam consumption for preheating the pulp and a slight reduction in the consumption of sulfuric acid.
  • these conditions (higher% of solids and production) represent a decrease in the operating cost of the plant, all of which demonstrates the importance of achieving an increase in the% of solids and productivity of the pulps in question.
  • the raw mineral pulp that will be fed to thickeners is mixed with the WL liquor in the ratio of liquor volume / thickened pulp volume from 0.60 to 1.2 and then discharged to thickeners, where the increase of the solids concentration is achieved up to in 3%.
  • this procedure does not allow the thickening of the thickeners to be recirculated to the raw ore pulp preparation plant, due to its relatively high content of Al, Mg, Mn and acidity, which makes it corrosive.
  • the invention has as a primary objective to increase the amount of ore to be processed and increase the production of nickel and cobalt in the existing facilities in a laterite or limonite processing plant, such as the pressure acid leaching plant, for example the Moa plant or in the projects under construction.
  • Another objective of the invention is to achieve an increase of! % of solids and sedimentation productivity, achieving with a minimum of equipment greater volume of ore to be processed and nickel and cobalt production.
  • a third objective is to obtain the salts used to increase the% solids of the lateritic pulps from the residuals of the plant itself
  • a fourth objective is to achieve an increase in pulp production with a higher% solids (1-5%) that make the process of recovering nickel and cobalt more economical.
  • the essence of the invention consists in the addition of 0.1-10 kg of. metallic salts / t of ore and 0.1-10 kg sulfuric acid / t of ore to the pulp of raw feed ore, mixed for a time between 0.2 and 10 minutes until reaching a final pH of the pulp between 2.5 and 6.0 in the thickeners .
  • metal salts such as ferrous sulfate or mixtures of ferrous sulfate and sulfate of other metals, such as aluminum, in an aqueous acidic medium, to improve the thickening of the raw mineral pulps, with increases in the weight concentrations of solids is novel in 1-5% and in sedimentation productivity between 120 and 180%, under these conditions they are pumpable pulps, reporting 40% lower viscosity.
  • H 2 SO 4 / mineral in relation to weight of H 2 SO 4 / mineral (0.1-1.0), it is stirred and leached for a time between 10-60 minutes, reaching a temperature between 90 and 11O 0 C and the diluted leached pulp or the resulting solution is treated with sulphide, such as the tails of the pressure acid leaching process are subjected to leaching with H 2 SO 4 .
  • the pulp with ferric sulfate and other metals are contacted with sodium sulphide or hydrogen sulphide, to reduce iron to ferrous.
  • Fe 3+ ions obtained from the leaching of the tails with H 2 SO 4 are reduced to ferrous ions Fe 2+ with solution Na 2 S obtained from the absorption of the H 2 S contained in the gases emitted by the sedimentators of the sulphide precipitation plant with caustic soda solution.
  • the process of reducing ferric ions to ferrous can be done by direct contact of the pulp activated with the aqueous solution containing the reducer.
  • the sulphide used can be obtained from the residuals of the sulphide precipitation plant, such as H2S, emanating from the settlers into the air, from the waters containing H2S or from a commercial product.
  • the proposed procedure is based on the use of metal salts, such as Fe +2 and / or Fe +2 + AL +3 in acid solutions, for example as ferrous sulfate and sulfuric acid dissolved in water in proportions of 15 to 0.5 , which mixed with the raw pulp is fed before the thickeners.
  • the salts can be in solid state (commercial salts), which in this case dissolve in water in an acidic medium or can be produced directly from waste of the plant by acid leaching.
  • the reagents used are relatively inexpensive and easily acquired.
  • FeSO 4 . 7H 2 O and H 2 SO 4 of 0.1 - 10 kg / t of ore and 0.1 - 10 kg per tonne of ore to be thickened respectively also allows to increase the productivity of the settlers between 120 - 180%, the concentration of solids in 1-5% and decrease the viscosity by 40-50%. 5. This procedure allows to increase the production of nickel and cobalt by more than 10% in relation to the current capacity of a plant in operation such as that of Moa.
  • Sedimentation confirmatory tests were conducted in two thickeners pilot equal capacity and area (0,2826m 2) with aqueous pulps (20% mineral solids) and flows 0.135 L / min, adding in one solution of sulfuric acid and sulfate Ferrous as additives with consumption of 2 and 6 kg / t of ore from these reagents respectively, taking the other settler as a reference (white).
  • a thickening test of an aqueous pulp was carried out in a 54cm diameter pilot settler with Moa ore prepared at 20.0% solids, with the use of the constituted additive by the mixture of ferrous sulfate and aluminum sulfate and adjusted the acid to 1.5 Kg of H 2 SO4 per ton of ore.
  • Table 2 shows the results of the tests with and without additive (blank).
  • the pulp obtained contained: 1.13 g / L of Fe 2+ equivalent to 5.65 g / l of FeSO 4 7H 2 O and 0.3 g / L of H 2 SO 4 and 1.80 g / L of solids.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Paper (AREA)
  • Coloring Foods And Improving Nutritive Qualities (AREA)

Abstract

Cette invention concerne l'hydrométallurgie non ferreux et plus particulièrement l'épaississement des pulpes aqueuses de minéraux latéritique dans la technologie acide sous pression. L'objectif est d'augmenter le pourcentage de solide et la productivité dans les modules d'épaississement des usines en fonctionnement et à cet effet un nouveau procédé a été mise au point. L'essence de l'invention porte sur l'ajout de sels métalliques (0,1 et 10,0 kg/t de minéral) en milieu acide (0,1 et 10,0 kg/t) aux pulpes brutes d'alimentation, lesquelles, en quantité adéquate, entraînent des augmentations des teneurs en solide entre 1 à 5 %, ainsi qu'une diminution de la viscosité de plus de 40 % des pulpes épaissies, avec une croissance de la productivité comprise entre 20 et 80 % en fonction du type de minéral, avec pour effet de conserver un pourcentage élevé de solides. Les sels métalliques sont en fer et aluminium en présence d'acide.
PCT/CU2007/000016 2006-08-07 2007-07-19 Procédé de traitement des pulpes aqueuses de minéraux latéritiques selon la technologie acide sous pression Ceased WO2008019633A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU2007283855A AU2007283855B2 (en) 2006-08-07 2007-07-19 Process for treating aqueous lateritic-ore pulps in pressurized acid technology
EP07785491A EP2058410B1 (fr) 2006-08-07 2007-07-19 Procédé de traitement des pulpes aqueuses de minéraux latéritiques selon la technologie acide sous pression

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CU2006-0155 2006-08-07
CU20060155A CU23353A1 (es) 2006-08-07 2006-08-07 Procedimiento para el tratamiento de las pulpas acuosas de minerales lateríticos en la tecnología ácida a presión

Publications (1)

Publication Number Publication Date
WO2008019633A1 true WO2008019633A1 (fr) 2008-02-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CU2007/000016 Ceased WO2008019633A1 (fr) 2006-08-07 2007-07-19 Procédé de traitement des pulpes aqueuses de minéraux latéritiques selon la technologie acide sous pression

Country Status (4)

Country Link
EP (1) EP2058410B1 (fr)
AU (1) AU2007283855B2 (fr)
CU (1) CU23353A1 (fr)
WO (1) WO2008019633A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2194148A1 (fr) * 2008-11-28 2010-06-09 Sumitomo Metal Mining Company Limited Procédé de production de sulfure du nickel et du cobalt dans une solution d'acide sulfurique contenant du nickel et du cobalt
US20110283831A1 (en) * 2008-06-20 2011-11-24 Eric Girvan Roche Process for the Recovery of Nickel and/or Cobalt from a Leach Solution

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111850305A (zh) * 2020-07-28 2020-10-30 昆明理工大学 一种从富锰钴渣中浸出钴和锰的方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2044720A1 (fr) 1969-04-10 1971-02-26 M & T Chemicals Inc
US3761566A (en) * 1971-09-13 1973-09-25 American Metal Climax Inc Leaching of nickel lateritic ores with waste iron sulfate solutions
GB2001612A (en) * 1977-08-01 1979-02-07 Amax Inc Leaching nickeliferous ores
EP0451456A1 (fr) * 1990-02-16 1991-10-16 Outokumpu Oy Procédé pour le traitement hydrométallurgique des matières brutes contenant des sulfures de zinc
CU22884A1 (es) 1999-06-16 2004-01-23 Ct De Investigaciones Para La Ind Mineroct De Inve Procedimiento para disminuir la contaminación ambiprocedimiento para disminuir la contaminación ambiental de la tecnología de lixiviación ácida a presental de la tecnología de lixiviación ácida a presión de minerales lateríticos ión de minerales lateríticos

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6391089B1 (en) * 2000-11-29 2002-05-21 Walter Curlook Acid leaching of nickel laterite ores for the extraction of their nickel and cobalt values
EP2006399A4 (fr) * 2006-02-24 2010-05-19 Ct De Investigaciones Y Proyec Procédé d'augmentation du pourcentage de solides de minéraux limonitiques et argileux dans les pulpes à acheminer vers les autoclaves lors de la lixiviation acide

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2044720A1 (fr) 1969-04-10 1971-02-26 M & T Chemicals Inc
US3761566A (en) * 1971-09-13 1973-09-25 American Metal Climax Inc Leaching of nickel lateritic ores with waste iron sulfate solutions
GB2001612A (en) * 1977-08-01 1979-02-07 Amax Inc Leaching nickeliferous ores
EP0451456A1 (fr) * 1990-02-16 1991-10-16 Outokumpu Oy Procédé pour le traitement hydrométallurgique des matières brutes contenant des sulfures de zinc
CU22884A1 (es) 1999-06-16 2004-01-23 Ct De Investigaciones Para La Ind Mineroct De Inve Procedimiento para disminuir la contaminación ambiprocedimiento para disminuir la contaminación ambiental de la tecnología de lixiviación ácida a presental de la tecnología de lixiviación ácida a presión de minerales lateríticos ión de minerales lateríticos

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
FALCAN, J., REVISTA MINERIA Y GEOLOGIA, pages 2 - 83
See also references of EP2058410A4 *
VALDES, F., REVISTA TECNOLÓGICA, no. 1984, pages 44 - 50

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110283831A1 (en) * 2008-06-20 2011-11-24 Eric Girvan Roche Process for the Recovery of Nickel and/or Cobalt from a Leach Solution
EP2194148A1 (fr) * 2008-11-28 2010-06-09 Sumitomo Metal Mining Company Limited Procédé de production de sulfure du nickel et du cobalt dans une solution d'acide sulfurique contenant du nickel et du cobalt
US8716177B2 (en) 2008-11-28 2014-05-06 Sumitomo Metal Mining Co., Ltd. Production process of sulfide containing nickel and cobalt

Also Published As

Publication number Publication date
EP2058410A4 (fr) 2010-12-01
EP2058410A1 (fr) 2009-05-13
AU2007283855B2 (en) 2012-07-26
CU23353A1 (es) 2009-03-16
AU2007283855A1 (en) 2008-02-21
EP2058410B1 (fr) 2012-04-18

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